New Hampshire, 2025Flash Flooding and Hail in New Hampshire, June 6 to 7, 2025
June 6 to 7, 2025 · NWS GYX · 16 events in 3 counties and zones
A stationary front stalled over southern New Hampshire on the evening of June 6 into midday on June 7th. Repeated rounds of heavy rain and thunderstorms brought up to 4 inches of rainfall to areas across Merrimack and Hillsborough Counties between 3 and 7 PM.
Every event with a place to put it. Tap one for its entry below.
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- Wind
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- Deaths
- 0
- Injuries
- 0
- Property damage
- None recorded
- Crop damage
- None recorded
- Events
- 16
Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.
A stationary front stalled over southern New Hampshire on the evening of June 6 into midday on June 7th. Repeated rounds of heavy rain and thunderstorms brought up to 4 inches of rainfall to areas across Merrimack and Hillsborough Counties between 3 and 7 PM. The heavy rain with rates measured over 2 inches per hour at times, was sufficient to cause flash flooding with multiple roads flooded, some with washouts, and some property damage. Numerous severe thunderstorms also developed on the afternoon of June 6th as amble instability and moisture interacted with the stalled front boundary. Large hail and damaging winds were reported.
Event by event
7 hail, 5 thunderstorm wind, 4 flash flood. Local standard time, as filed.
Thunderstorm Wind, Merrimack
- When
- June 6, 1:58 PM EST to 2:02 PM EST
- Where
- Merrimack County, West Hopkinton
- Measured
- 52 kt (60 mph) estimated gust
- Reported by
- Trained Spotter
- Coordinates
- 43.180, -71.750
Severe thunderstorm outflow winds downed trees on NH Route 127 near Contoocook State Forest.
Hail, Merrimack
- When
- June 6, 2:10 PM EST to 2:15 PM EST
- Where
- Merrimack County, 1.22 mi NW of West Hopkinton
- Measured
- 1.25 in hail
- Reported by
- Trained Spotter
- Coordinates
- 43.190, -71.770
A severe thunderstorm dropped hail the size of quarters on Old Hopkinton Rd. in Hopkinton.
Thunderstorm Wind, Sullivan
- When
- June 6, 2:15 PM EST to 2:20 PM EST
- Where
- Sullivan County, 0.85 mi SW of Cornish Mills
- Measured
- 52 kt (60 mph) estimated gust
- Reported by
- Trained Spotter
- Coordinates
- 43.460, -72.390
Severe thunderstorm outflow winds downed 2 trees down on NH-12A, partially blocking a road in Cornish.
Thunderstorm Wind, Sullivan
- When
- June 6, 2:30 PM EST to 2:35 PM EST
- Where
- Sullivan County, Cornish Flat
- Measured
- 52 kt (60 mph) estimated gust
- Reported by
- Public
- Coordinates
- 43.500, -72.280
Severe thunderstorm outflow winds downed numerous smaller trees and branches on Cornish Stage Rd. and Cornish Flats.
Hail, Merrimack
- When
- June 6, 2:36 PM EST to 2:40 PM EST
- Where
- Merrimack County, 0.85 mi SE of North Sutton Arpt
- Measured
- 1.25 in hail
- Reported by
- Fire Department/Rescue
- Coordinates
- 43.360, -71.910
A severe thunderstorm dropped hail the size of quarters in North Sutton.
Hail, Hillsborough
- When
- June 6, 2:50 PM EST to 2:55 PM EST
- Where
- Hillsborough County, 1.01 mi W of West Deering
- Measured
- 1 in hail
- Reported by
- Trained Spotter
- Coordinates
- 43.080, -71.920
A severe thunderstorm dropped hail the size of quarters south of Hillsborough.
Hail, Merrimack
- When
- June 6, 3:32 PM EST to 3:36 PM EST
- Where
- Merrimack County, 1.38 mi N of Penacook
- Measured
- 1 in hail
- Reported by
- Amateur Radio
- Coordinates
- 43.300, -71.600
A severe thunderstorm dropped hail the size of quarters north of Boscawen.
Hail, Hillsborough
- When
- June 6, 3:50 PM EST to 3:55 PM EST
- Where
- Hillsborough County, 1.47 mi NNE of South Weare
- Measured
- 1.25 in hail
- Reported by
- Amateur Radio
- Coordinates
- 43.070, -71.720
A severe thunderstorm dropped hail the size of half dollars in Weare.
Hail, Merrimack
- When
- June 6, 4:06 PM EST to 4:10 PM EST
- Where
- Merrimack County, 0.5 mi W of Dunbarton
- Measured
- 1.25 in hail
- Reported by
- Trained Spotter
- Coordinates
- 43.100, -71.630
A severe thunderstorm dropped hail the size of half dollars in Dunbarton.
Thunderstorm Wind, Merrimack
- When
- June 6, 4:06 PM EST to 4:10 PM EST
- Where
- Merrimack County, 1.66 mi WNW of Bow Center
- Measured
- 52 kt (60 mph) estimated gust
- Reported by
- Public
- Coordinates
- 43.140, -71.580
Severe thunderstorm outflow winds downed a few small trees down across Clement hill Rd. in Bow.
Hail, Merrimack
- When
- June 6, 4:18 PM EST to 4:22 PM EST
- Where
- Merrimack County, 0.5 mi E of Bow Center
- Measured
- 1.25 in hail
- Reported by
- Public
- Coordinates
- 43.130, -71.540
A severe thunderstorm dropped hail the size of half dollars in Bow.
Flash Flood, Merrimack
- When
- June 6, 4:52 PM EST to 6:00 PM EST
- Where
- Merrimack County, 1.78 mi S of West Henniker to 2.27 mi WNW of West Henniker
- Cause
- Heavy Rain
- Reported by
- Department of Highways
- Coordinates
- 43.144, -71.850
In Henniker, highway and road management reported road damage from flooding along Bear Hill Road, Ray Road, Hemlock Corner Loop and parts of Dodge Hill Road due to heavy downpours dropping around 3 inches of rain on saturated soils.
Thunderstorm Wind, Hillsborough
- When
- June 6, 5:06 PM EST to 5:10 PM EST
- Where
- Hillsborough County, 1.01 mi W of Temple
- Measured
- 52 kt (60 mph) estimated gust
- Reported by
- Amateur Radio
- Coordinates
- 42.820, -71.850
Severe thunderstorm outflow winds downed multiple trees and wires down across town in Temple.
Flash Flood, Hillsborough
- When
- June 6, 5:23 PM EST to 6:30 PM EST
- Where
- Hillsborough County, 1.31 mi SE of Hillsboro Lower Vlg to 0.71 mi NNW of Antrim Center
- Cause
- Heavy Rain
- Reported by
- Park/Forest Service
- Coordinates
- 43.105, -71.934
Repeating thunderstorms brought up to 4 inches of rainfall to the Antrim area between 3 pm and 7 pm on June 6. The high rainfall rates on nearly saturated ground resulted in flooding of Routes 31 and 9, with some minor shoulder damage. Local roads were more impacted with minor to moderate washouts along Reed Carr, Liberty Farm, Stacy Hill, and Farmstead Roads. The most significant flooding of the event occurred along Mountainside Drive off Franklin Pierce Lake where runoff eroded a driveway to the home foundation, damaging 2 vehicles.
Flash Flood, Hillsborough
- When
- June 6, 5:54 PM EST to 7:14 PM EST
- Where
- Hillsborough County, 0.44 mi SE of Hillsborough to 0.44 mi SW of Hillsborough
- Cause
- Heavy Rain
- Reported by
- Fire Department/Rescue
- Coordinates
- 43.115, -71.895
In Hillsborough, heavy rain measured up to 3.91 inches fell on the evening of June 9. at the major thruway Route 9 was closed between Henniker St and Antrim Road due to flooding of both lanes. Additional road closures due to flooding occurred on the following roads Center Road between Hillcat Road and Jones Road, Bible Hill Road, Shed Road, and Contoocook Falls Road.
Flash Flood, Hillsborough
- When
- June 7, 1:03 PM EST to 2:30 PM EST
- Where
- Hillsborough County, 2.65 mi ESE of Peterborough to 2.29 mi ESE of Peterborough
- Cause
- Heavy Rain
- Reported by
- Park/Forest Service
- Coordinates
- 42.861, -71.879
A burst of torrential rainfall over saturated ground resulted in a washout along Miller State Park Road on the afternoon of June 6. The rainfall estimated to have rainfall rates of 2 inches per hour cause excessive and rapid runoff over the high sloped terrain of the Pack Monadnock.
- Thunderstorm Wind
- Winds from a thunderstorm of 50 knots (58 mph) or more, or lower winds that caused damage or casualties. Measured gusts are marked MG, estimated EG.
- Hail
- Hail three-quarters of an inch or larger, or smaller hail that caused damage, filed with the largest stone measured.
- Flash Flood
- Flooding that begins within six hours of the rain that causes it, or of a dam or levee failure or ice jam release, often with deadly speed.
After NWS Directive 10-1605, the rules offices file Storm Data by.
- Heat in Nevada, June 6 to 8, 20256 deaths · 2 events
- Heat in Arizona, June 6 to 7, 20254 deaths · 2 events
- Tornadoes and Flash Flood in Texas, June 6 to 7, 2025$202,000 · EF2 · 20 events
- Tornadoes and Hail in Oklahoma, June 6 to 7, 20251 injured · $296,000 · EF1 · 40 events
- Tornadoes and Damaging Winds in Arkansas, June 6, 20251 injured · $520,000 · EF1 · 8 events
- Tornado and Flash Flooding in Missouri, June 6 to 7, 2025$108,000 · EF1 · 40 events
- Tornadoes and Flood in Oklahoma, June 6, 2025$178,000 · EF1 · 27 events
- Tornadoes and Damaging Winds in Oklahoma, June 6, 2025$219,000 · EF1 · 15 events
- Flash Flooding in Pennsylvania, June 6, 2025$303,000 · 26 events
- Damaging Winds in Virginia, June 6, 2025$362,000 · 65 kt wind · 17 events
- Flash Flooding and Flooding in New York, June 6 to 7, 2025$262,000 · 57 kt wind · 14 events
- Tornado and Damaging Winds in Tennessee, June 6, 2025$297,000 · EF0 · 6 events
NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-10-01. Each event’s entry at NCEI: 1269722, 1269634, 1269718, 1269719, 1269635, 1269636, 1269637, 1269638, 1269639, 1269720, 1269640, 1252490, 1269724, 1252505, 1252492, 1252495.